Metal-punching mechanism.



J. K. GRAHAM .& G. RASMUSSEN.

METAL PU-NCHING MECHANISM. 7 APPLICATION FILED JUNE 12. I915- 1,17 ,797, Patented Apr. 11, 1916.

6 SHEETS-SHEET lm dum i J. K. GRAHAM & e. RASMUSSEN.

METAL PUNCHING MECHANISM. APPLICATION men mm: 12.1915.

1,178,797. Patented Apr. 11,1916.

6 SHEETS-SHEET 2.

v E o 55 MW 4- g L K. GRAHAM & G. RASMUSSEN.

METAL PUNCHING MECHANISM. APPLICATION FILED JUNE 12, 1915.

Patented Apr. 11, 1916.

6 SHEETS-SHEET 3 Jji. Graham, and fieoryefizymwser 0141.14 II. M

Gnome/:

J. K. GRAHAM & G. RASMUSSEN.

METAL PUNCHING MECHANISM.

APPLICATION man JUNE 12. 1915.

Patented Apr. 11, 1916.

6 SHEETS-SHEET 4.

- and Jjf Gear Graham J. K. GRAHAM & G. RASMUSSEN. METAL PUNCHING MECHANISM.

APPLICATION FILED JUNE I2, I915. 1,178,797. Patented Apr. 11,1916.

6 SHEETS-SHEET 5.

awe/whom: 'Jji' (ins/72am K. GRAHAM & G. RASMUSSEN.

METAL PUNCHING MECHANISM. APPLICATION FILED JUNE 12. 1915.

Patented Apr. '11, 1916.

6 SHEETS-SHEET 6.

and fieol gefidsmwseiz JOHN K. GRAHAM AND GEORGE RASMUSSEN, 0F RO'ANOKE, VIRGINIA.

METAL PUNGHING MECHANISM.

Specification of Letters Patent.

Patented Apr. 11, 1916.

Application filed June 12, 1915. Serial 110,313,654.

To all whom it may concern:

Be it known that we, JOHN K. GRAHAM and GEORGE RAsMUssnN, respectively a citizen of the United States and a subject of the German Emperor, residing in the city of Roanoke, county of Roanoke, and State of Virginia, have invented certain Improvements in Metal-Punching Mechanism, of which the following is a specification.

Our invention relates to mechanism for punching metal such as is used in structural work, and our primary object is to facilitate the operations of punching sheets, shapes and the like so that the same shall be done accurately and rapidly by automatically controlled multiple punches.

The characteristic idea of our invention resides in novel means comprising a master form or templet, multiple punches, and mechanism comprising electric circuits controlled by the movements of said templet for controlling the actions of said punches.

The invention is fully disclosed in the following description and the accompanying drawings in illustration thereof.

In the drawings, Figure 1 is a broken front elevation ofa part of a machine embodyingour invention; Fig. 2 is a vertical sectional view taken on the line 2'-2 of Fig. 1; Fig. 3 is a broken vertical sectional view on an enlarged scale of a second position of details of the construction shown in Fig. 2; Fig. 4 is a broken end elevation of the templet carrying mechanism combined with the circuit controlling mechanism controlled by the templet; Fig. 4 is a broken plan view of circuit controlling mechanism; Fig. 5 is a broken front elevation of the construction shown in Fig. 4; and Fig. 6 is a diagrammatic view of the wiring system with mechanism combined therewith.

The invention, in the form thereof illustratedin the drawings, comprises a housing 1 provided with the reciprocatory head 2, which carries a desired number of punches 3 adapted to reciprocate in the guides 4 fixed .to the bottom of the head, and the revoluble eccentric or crank shaft 5, which is connected with the head by means of the pitman 6 to effect the desired reciprocating movement of such head. Anvils 7 are provided with the die blocks 8 on which is held the work 9 t0 be-punched, upon the descent of the head 2, byIselected punches 3 which are rendered operative throughthe action of the master mechanism.

' eating through and The master mechanism comprises independently operating slides 10 which are adapted to be reciprocated in ways 11 in the bottom of the head 2 and above the respective punches. The slides are thrust in to prevent downward movement of the head on or independently of the punches which ing an armature 11 and with a bearing 12 on which is fulcrumed a lever 14 pivotally connected to the armature. Each lever 12 is also pivotally connected to a rod 15, which is provided with the adjustable stops l5 on opposite sides of the bearing 12 to contact therewith for limiting the reciprocations of the rod, the latter reciprobeing controlled by the hearing or guide 12 on the lever 12 as well as by the bearings 12 and 12.

The head 2 is further provided with the forwardly extending guides 16 on which is mounted a bar 17 adapted to be reciprocated to and from the head across the lines of the rods 15 in their positions when the slides 10 are drawn back, the bar being adapted for engaging the respective rods when elevated by the armatures for the purpose of rocking thelevers 12 and moving in the slides 10 to positions directly above the punches 3.

The bar 17 is reciprocated on the guides 16 in synchronous relation to the reciprocations of the head 2 by providing the shaft 5 with cams 18 which engage crank levers 19 through their roller 19*; these levers being fulcrumed by means of a rod 20 carried by the housing 1, connected with the bar 17 by the links 21 and connected by a bar 22 adapted for engaging the tops of the levers 12. I

A frame 23 is fixed to the housing 1 and has journaled therein the top roller 24 (on which is rolled the paper pattern or templet elevating the rollers.

25 at the beginning of the operation), the bottom roller 26 (onto which the pattern 1s Wound from the roller 24 during the operation), the intermediate feed roller 27 (having sprockets 27 for engaging the edge perforations 25 of the pattern), the intermediate guide rollers 28 (on opposite sldes of the roller 27), and the tracker roller 29 provided with circular channels 29 (with which the patterns perforations 25 register) the roller 24 being provided with a handle 24 for rewinding, the rollers 26 and 27 being connected by the belt 30 to effect their coordinate action and the roller 27 having .a driving ratchet 27 fixed on its journal 27, whereby the pattern is carried forward.

A lever 31 is fulcrumed on the journal 27 carries a pawl 31 for driving the ratchet. 27 and is oscillated synchronouslyikwith"the reciprocation of the head 2 .by, a, having a fulcrum 32' on thei ho'us pivotal connection 32 with the h a link connection 33 with the lever 3 3 Contact levers 34, corresponding to th respective grooves 29*, are fulcrumed on a bar 35 of the frame 23. The levers have thereon the rollers 34 which are adapted to ride on the pattern 25 as it passes around the roller 29 and to pass through the registering perforation 25 into the groove 29 and are provided with the weigl tzs '34 for A cam bar36,[operated by the handle 36 serves to elevate the levers 34 and disengage the pattern 25. Insulated contact pins 37 are held adjustably in the bearing 38 of the frame in position to be enga ed by the levers 34 when their weighted en s fall, upon the passage of their rollers 34 through the perforations25 of the pattern 25. .i

The respective levers 34 and contact pins 37 are in circuit with the respective solenoid or electro-magnet coils 11. Each-lever 34 is connected by a conductor" 39 with a con- 3 tact 40 supported by the housing *yokel, the contact 40 being adapted fon-engagement by a contact 41 of a lever 42 whlch is fulcrumedfon the yoke 1 5b so as toprevent sparking. The contact-41 is connected by a conductor 42" with a switch 43 through which current is admitted, and the switch is connected by a conductor 44 with the respective solenoids 11. 7 Each solenoid 11 1s connected by a conductor 45 with a binding post 46 on the frame 23 and through the binding post by conductors 47, with the respective contacts 37.

In operation, the pattern 25, which is perforated to scale proportionate to the sheet 1 or shape to be punched, is moved from the roller 24 onto the roller 26, over the rollers 27, 28 and 29, in synchronism with the reciprocations of the head 2, by the action of the latter through the parts 32, 33, 31, 31 and register with perforations 25 of the tern, the Weighted arms of the levers 34, "corresponding to such rollers, drop into en- )gagement with the corresponding contact pins37 andclosethe circuits containing the corresponding electro-magnetic or solenoid thus excited by the rollers34 from and moved from its normally .dlsen'gaged positionby a camv set on the shaft 5 to control the circuits;

active, and their armatures 11 are elevated by the weight of the rods 15 the latter falling automatically out of the path of the bar 17. As the bar 17 is reciprocated on the guides 16 (by the cams 5 acting through the parts 19 and 21) it will. not affect the levers 12 Whose rods 15 are down, in which position the slides 10 are withdrawn, due to the action of the bar 22 on the levers. Hence the head 2, will move down on the corresponding punches 3, Which are thus inoperative. But vwhen a roller or rollers 34 patcoil s 11. These coils 11, the closure of their circuits, draw in their armatures 11*, which act through the corresponding levers 14 to elevate the respective rods 15 into the path of the-bar 17. Hence when this bar 17 is drawn back- (by the action of the cams 5 through the parts 19 and 21) it acts on the elevated rods 15 to rock the corresponding levers 12 and thrust inthe slides 10 above the'r'espective punches 3, which are thereby supported so that upon the descent of the head 2 such selected punches are forced through the metal 9.

Having-described our invention, we claim: 1. In a metal punching machine, the combination of a set of punches adapted to. reciprocate independently, independently movable bearings for the normally disengaged devices for moving said bearings, a pattern, and means comprising electric circuits closed through said pattern for selectively effecting the engagement of the-devices for operating the respective bearings.

2. In a metal punching machine, the combination of a reciprocating member, a punch carried by and having a limited movement relative to said member, a device for preventing the normal relative movement between said member and punch, means comprising a lever for reciprocating said device,

means comprising a lever for reciprocating said lever first named, a pattern, and mechanism comprising an electric circuit having contacts connected through said pattern whereby a connection is effected between the means specified.

3. In a metal punching machine, the comrespective punches,

bination of a reciprocating head, a plurality of punches carried by and movable relatively to said head, reciprocating devices for restricting the movement between said head and the respective punches, lever mechanisms for reciprocating the respective {dc- 1' vices, lever mechanisms for I'GClpIOcELtlIlg the respective lever mechanisms first named, a pattern, and electrical means whereby said pattern effects selective engagements of lever mechanisms first named and lever mechanisms second named.

4. In a metal punching machine, the

for controlling the relative movements between said head and the respective punches,- mechanisms for mechanically operating said devices, a pattern, adapted for controlling an electric circuit, means whereby said pattern is moved in coordination with the re-.

ciprocation of said head, and means comprising an electric circuit whereby said pattern controls selectively operative engagements between the respective mechanisms and devices.

5. In a metal punching machine, the combination of a reciprocating head, punches carried by and having a limited movement relative to said head, reciprocating devices carried by said head to provide removable bearings for the respective punches, a pattern, means for carrying said pattern, means operated by said head for moving said pattern, and means comprising an electric circuit whereby said bearings are operated and the respective punches are controlled.

6. In a metal punching machine, a reciprocating member, a punch carried by and having a limited movement of reciprocation relative to said member, a device carried by and movable relative to said member to provide a bearing for said punch, a lever carried by said member whereby said device is movable into and out of cooperative relation with said punch, a pattern, and means comprising a circuit containing an electromagnet for rocking said lever.

7. In a metal punching machine, a reciprocating head, a' punch carried by and having a limited movement relative to said head, a reciprocating bearing carried by saidhead for holding said punch, a lever carried by said head and connected with said bearing to effect its reciprocation, a reciprocating member carried by said lever, means comprising an electro-magnet for moving said member, a revoluble shaft, means whereby said shaft reciprocates said head, means whereby said shaft acts through said member to rock said lever, a pattern, and means controlled by said pattern for controlling said electromagnet.

8. In a punching machine, a housing, a head adapted to reciprocate in said housing,

. multiple punches carried by said head and respectively adapted to reciprocate therein, sliding bearings carried by said head and adapted to be operated independently to ijlimit relative movement between said head'f and the respective punches, levers fulucrumed on said head and connected with the respective bearings to effect their reciprocations,' .memb'ers carried by the respective levers and adapted to reciprocate relatively ;thereto, a shaft movable in said housing, .means whereby said shaft effects the reciproca'tion of'said head, means comprising a reciprocating device operated by said shaft for engaging said members, said members beingmovable into and out of position for engagement by said reciprocating device,

means'comprising electro-magnets for oper-' a'ting said members, and means comprising a pattern for selectively excitmg said electro-magnets.

9. In a metal. punching machine, a perfo- M rated pattern, means comprising a roller containing channels over which'said pattern is carried with perforations thereof in registration with respective channels, reciprocating devices adapted to'bear against said pattern and to enter saidchannels through respective perforations of said pattern, electro-magnetic mechanism comprising circuits controlled by said devices, reciprocating punches, and means operated selectively by said electro-magnetic. mechanism for c0ntrolling the movements of said punches.

10. In a metal punching machine, a pattern, means for translating said pattern, contact levers controlled by said pattern, circuits containing electro-magnets controlled by said levers, a set of independently movable punches, and means acting under control of said electro-magnets for controlling the actions of said punches.

11. In a metal punching machine, a. perforated pattern, means comprising a recessed device with which perforations of said pat tern are adapted to register, circuits comprising electro-magnets and reciprocating circuit closers adapted to enter the recesses of said device through the perforations of said pattern, armatures adapted to be operated by said electro-magnets, levers whereby said electro magnets and armatures are carried, a plurality of independently movable punches, means-operated by said levers for controlling said punches, and means comprising devices operated by said armatures for operatingsaid levers.

12. In a metal punching machine, a reciprocating head, punches having limited movements of reciprocation in said head, devices adapted to slide in said head transversely to said punches to hold the same,

levers fulcrumed on said head and connected with said devices to effect their reciprocation, electro-magnets carried by the respective levers, armatures adapted to be opermatures whereby they are operated, guiding means carried by said head, reciprocating means carried by said guiding means for engaging said rods and rocking said levers, a revoluble shaft, means whereby said shaft reciprocates said head and means whereby said shaft operates said reciprocating means.

13. In a metal punching machine, a housing, a shaft journaled in said housing, a head, means whereby said shaft reciprocates said head, a set of punches respectively adapted to move in said head, sliding devices carried by said head to provide bearings for the respective punches, levers fulcrumed on said head and connected with said sliding device to efiect their reciprocation, electromagnets carried by the respective levers, guiding means carried by said head, mechanism adapted to reciprocate on said guiding means, devices carried by said levers and operated by said electro-magnets whereby said mechanism operates said levers, a cam on said shaft, and means whereby Said cam operates said mechanism.

14. In a metal punching machine, a reciprocating punch, a reciprocating device avage? adapted to provide a bearing for supporting said punch, a fulcrumed lever connected with said device to move it into and out of position for holding said punch, a reciproeating rod on said lever, means comprising an electro-magnet for operating said rod, a reciprocating device for engaging said rod to operate said lever, a pattern, and means whereby said pattern controls the action of said electro-magnet.

15. In a metal punching machine, a housing, a head adapted to reciprocate in said housing, punches carried by said head and adapted to move relatively thereto, devices adapted to reciprocate in said head to provide bearings for said punches, means com prising circuits containing electro-magnets for operating said devices, a perforated pattern, means operated by said head for translating said pattern, and a set of contact levers controlled by said pattern Wherebysa id circuits are controlled.

in testimony whereof We have hereunto set our names this tenth day of June, 1915..

JQHN K. GRAHAM. eEo. easiunssam 

